Stove or furnace



9 9 m 1 n a 1 d e t n e t a P N o s m B 0 Dn F 7 5 j n 6 0 N STOVE 0RFURNACE.

(Application filed July 12, 1897.)

(No Model.)

WITNESSES 1 By fliiorneys m: Noam: PEYERS co, PHOTO-LITHQ, wxsumarov, nc

'the county of Genesee, State of Michigan,

UNTTED STATES PATENT Erica.

EDGAR D. KENNEDY, OF DETROIT, AND BERNARD J. STURN,

FENTON, MICHIGAN.

STOVE OR FURNACE.

SPECIFICATION forming part of Letters Patent No. 617,557, dated January10, 1899.

Application filed July 12,1897. Serial No. 644,260. (No model.)

To (ti/Z whom it may concern:

Be it known that I, FRANK ROBINSON, a citi zen of the United States,residing at Flint, in

have invented certain new and useful Improvements in Stoves or Furnaces;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

This invention relates to stoves and furnaces; and it consists in theconstruction and arrangement of parts hereinafter fully set forth, andpointed out particularly in the claims.

The objects of the invention are to provide a magazine-feed to supplyfuel to the fire, to protect said fuel from the intense heat of the fireuntil it reaches the fire-pot proper, to providemeans for relieving thegrate from ashes and for presenting fresh fuel to the fire by a simplerotation of said grate, to provide for maintaining a rapid circulationof air through the heating-chamber of the stove and a discharge ofheated air into the room or into the heat-conveying pipes, at the sametime drawing the cold air from the floor when the device is used in astove, and to provide means whereby the gases liberated from the burningcoal are consumed as well as a great portion of the smoke or visibleproducts of combustion. These objects are attained by the constructionillustrated in the accompanying drawings, in which- Figure l is avertical central section through a stove or heating apparatus embodyingmy invention. Fig. 2 is a horizontal section, as on line 2 2 of Fig. 1.Fig. 3 is an inverted plan of the bottom of the stove. Fig. 4; is ahorizontal section, as on line 4 e of Fig. 1.

Referring to the letters of reference, A designates the body of thestove, which may be of any desired shape, but which is herein shown asbeing of a cylindrical body, oval in form. Within this body is a sinuousdividing-partition B, which separates the interior of said bodyhorizontally. This partition extends from the inner wall of the stove ata suitable pointabove the fire-box and curves inward and downward, as ata, to a point some distance above the grate, where a return-bend is madetherein, as at a, from which point said partition extends upwardparallel to the wall aand curving inward from all sides unites in thearch or dome 1), thereby forming a circular magazine-chamber O betweenthe outer wall a of said partition and the wall of the stove and acombustion-ch amberD within the center of the stove, both of whichchambers communicate with the fire-space, also forming in the upperportion of the stove a hot-air chamber E, having a circular dependingportion 6, which surrounds the base of said combustion-chamber. Belowthe body of the stove is a suitable base F, adapted to contain theash-pan F and provided with the draft-openings d. Crossing the center ofthis base is a horizontal rod G, which is suitably attached at its endsthereto and provided at or near its longitudinal center with avertically-extending pintle c, adapted to form a journal.

H designates a circular grate which fits within the bottom of the stoveand is provided with a central socket f, which receives the pintle c andforms a pivot or bearing, upon which said grate rotates. Upon the underface of said grate is a cogged ring it, which is adapted to be engagedby abeveled pinion h, mounted on a short shaft I, journaled in the baseof the stove and adapted to receive on its outer end a crank I, by meansof which said shaft is rotated and said grate revolved.

Formed integral with the grate H and mounted upon the upper face thereofnear its outer edge is a series of conical projections J, having asemicircular base which curves inward to the line of openings throughsaid grate. The outer faces of these conical projections or bodies J arecurved concentric with the wall of the stove, which is recessed, as atg, to receive said conical bodies, so that the apexes thereof shallstand within the line of the inner face of the wall of said stove to prevent a wedging of the fuel between said conical bodies and thestovenvall.

The fuel is supplied to the magazine-chamber 0 through the inwardly-swingin g doors K which open through the wall of the stove, and of whichthere may be three or more, as shown in Fig. 2. It is necessary to havea sufficient number of these fuel-doors to enable the fuel to be evenlydistributed within the magazinechamber, so that it shall form a solidcircular body within said chamber, as shown at L in Fig. 1. The lowerend of the magazine-chamber C is open, as shown, and communicates. withthe grate and fire-pot, so that the fuel contained therein is constantlysupplied to the fire which is burning upon said grate.

To provide for removing the ashes of the consumed fuel and for providingfresh fuel to the fire as required, the rotary grate, with its conicalprojections J, is employed. The rotation of said grate through themedium of the crank I will cause said conical projections to engage theunconsumed fuel lying between them and in advance of the direction oftheir travel and force said fuel inward, the space in the wake of saidtraveling projections being occupied by fresh fuel from above, whichdrops down after the passage of said conical bodies, whereby the fuel iscrowded in toward the center of the grate and caused to heap up thereonto a line approximate the lower bends a of the sinuous partition B,insuring at all times the presence in the fire-pot of a sufficientamount of live fuel to maintain a strong fire, while by the rotation ofsaid grate in the operation of crowding inward the unconsumed fuel asdescribed the ashes are caused to fall through said grate into theash-pan, keeping said grate free and insuring a sufficient supply of airto amply support combustion.

M designates a series of pipes which pass through the base of the stoveand whose upper ends are provided with a right-angled bend which extendsthrough the fuel-magazine and communicates with the interior of theheating-chamber of the stove at the bottom of the depending portion 6thereof, whereby provision is made for the passage of a current of coldair, which is drawn from the floor into the heating-chamber, in which itis quickly and intensely heated and from which it passes through theservice-pipe N, through which pipes the heated air may be conveyed toany desired point where the device is serving as a furnace, thedirection taken by said air in its passage through said chamber beinginclicated by feathered arrows in Fig 1. When the device is serving as astove, the pipes N leading from the heating-chamber may be shortnipples, from which the heated air discharges into the room. By thisarrangement it will be observed that a rapid circulation of air ismaintained, the cold air being drawn from the floor, passed through theheatingchamber, and discharged into the room.

The flue-pipe O, which carries away the products of combustion,communicates with the upper portion of the combustion-chamber D, asclearly shown in Fig. 1.

The return-bend ct of the dividing-parti tion which forms the lower wallof the heating-chamber stands adjacent to the fire within the fire-box,and therefore this portion of said wall becomes intensely heated. Thetemperature of said wall, however, is somewhat reduced by the dischargeof the cold-air pipes into the lower portion of said chamber at thispoint, whereby excessive heating of said wall is obviated and at thesame time the advantage is obtained of the discharge of the coldaircurrents into theheating-chamber at the point of the highesttemperature.

As will be seen on referring to Fig. 1, the coal burns strongly in thecenter immediately above the grate l-I, while the fuel is supplied fromaround the sides, the point of strongest combustion being through thecenter of the fire-pot, which is directly in line with thecombustion-chamber D. Therefore the smoke and gases liberated from thecoal before reaching the flue must pass over or through the fire andinto the combustionchamber, in which passage they are nearly or quiteconsumed, thereby reducing the emission of smoke to a minimum andutilizing all of the products of the fuel for the generation of heat.

lVhen the fire shall have attained sufficient headway, the lowerdraft-openings in the stove may be closed and the draft-openings m inthe fuel-doors K may be opened, so that the air-draft which suppliescombustion will be compelled to pass downward through the fuel-chamber,thereby carrying into the fire any gas which may have accumulated insaid chamber and preventing its escape into the room. It will also beseen that by reason of the sinuous dividing-partition B, forming, as itdoes, a portion of the heating-chamber e between the combustion-chamberand magazine-chamber, said magazine-chamber is protected from the directheat of the fire and the cooking of the coal in the magazine isobviated.

Opening through one side of the stove is a passage-way P, whichcommunicates with the combustion-chamber and which is closed by the doorB. This opening affords access to the interior of the combustion-chamberand the fire-pot.

Having thus fully set forth my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In a stove or furnace, the combination of the body of the stove, thedividing-partition therein forming an outer annular magazinechamber andan inner combustion-chamber centrally located with respect to saidmagazine, the rotary grate carrying the conical bodies which projectinwardly from the wall of the stove below said magazine whereby by therotation of the grate the fuel is forced in ICC ward thereon and meansfor rotating said grate.

2. In a stove, the combination with the r0.- tary grate carrying theinwardly-projecting bodies which are mounted upon the margin of saidgrate, the annular magazine-chamber located around the wall of the stoveadapted to feed fuel onto the outer margin of said grate, thecombustion-chamber located centrally within said magazine-chamber, andmeans for rotating said grate whereby the fuel may be forced inward intothe combustion-chamber to supply the fire at the center of the grate.

3. In a stove, the combination of the body of the stove, thedividing-partition therein forming within the stove an outer annularmagazine-chamber located around its inner wall, and an innercombustion-chamber centrally located with respect to said magazine, thegrate below said magazine and said combustion-chamber and means forforcing the fuel inward to said combustion-chamber.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK ROBINSON.

Witnesses:

DAVID A. CLARK, LESTER H. HENDERSON.

